title: Impact of fractional flow reserve measurement on the clinical management of patients with coronary artery disease evaluated with noninvasive stress tests prior to cardiac catheterization.
abstract: OBJECTIVE
  Fractional flow reserve (FFR) is often performed to assess the severity of coronary artery stenoses. However, the usefulness of measuring FFR when a noninvasive test has been obtained prior to coronary angiography has not been studied.
  
  
  METHODS
  We retrospectively reviewed 122 patients who underwent noninvasive stress test with cardiac imaging (SPECT or stress echocardiography) prior to FFR assessment of a coronary lesion. The usefulness of FFR measurement was determined. FFR was judged useful if decision to revascularize the patient reflected the result of FFR rather than the result of the stress test.
  
  
  RESULTS
  A total of 136 lesions were evaluated. Of these, 66 were associated with a positive noninvasive test and 70 had no ischemia present in the territory of the evaluated vessel. When FFR was negative (> or =0.75) and the test positive (57 lesions), revascularization was deferred in 55. When FFR was positive (<0.75) and the functional test negative (8 lesions), revascularization was performed in 8. FFR measurement changed the clinical decision to revascularize the patient in 55 (83%) of the 66 lesions with ischemia documented on noninvasive tests compared to 8 (11%) of the 70 lesions without ischemia (P<.0001).
  
  
  CONCLUSIONS
  FFR can be helpful in patients with coronary artery disease even when noninvasive testing is performed prior to coronary angiography. In this study, FFR measurement had the greatest impact in the evaluation of lesions with documented ischemia on noninvasive tests. In these patients, appropriate use of FFR based on the operator's judgment can prevent unnecessary revascularizations of intermediate lesions.
authors.affiliation: Quebec Heart and Lung Institute, Quebec City, Quebec, Canada.
authors.forename: Philippe
authors.initials: P
authors.lastname: Lachance
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Déry
authors.forename: Josep
authors.initials: J
authors.lastname: Rodés-Cabau
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Potvin
authors.forename: Gérald
authors.initials: G
authors.lastname: Barbeau
authors.forename: Olivier F
authors.initials: OF
authors.lastname: Bertrand
authors.forename: Onil
authors.initials: O
authors.lastname: Gleeton
authors.forename: Eric
authors.initials: E
authors.lastname: Larose
authors.forename: Can M
authors.initials: CM
authors.lastname: Nguyen
authors.forename: Bernard
authors.initials: B
authors.lastname: Noël
authors.forename: Guy
authors.initials: G
authors.lastname: Proulx
authors.forename: Louis
authors.initials: L
authors.lastname: Roy
authors.forename: Robert
authors.initials: R
authors.lastname: De Larochellière
mesh_terms: D000368:Aged; D006328:Cardiac Catheterization; D055426:Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography; D017023:Coronary Angiography; D023921:Coronary Stenosis / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy; D025401:Echocardiography, Stress; D005260:Female; D053805:Fractional Flow Reserve, Myocardial; D006801:Humans; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy; D009204:Myocardial Revascularization; D018579:Patient Selection; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012720:Severity of Illness Index